Telescopic ladder stand

Abstract

The utility model belongs to a ladder stand device in constructional engineering, and particularly relates to a telescopic ladder stand which comprises a fixed ladder fixed on the upper portion of a structure, the fixed ladder is composed of a plurality of ladder steps, a telescopic ladder is arranged on the outer sides of the ladder steps, the telescopic ladder comprises a sliding rail and ladder plates, the sliding rail adopts two U-shaped steel channels, notches of the U-shaped steel channels are oppositely arranged, and the U-shaped steel channels are fixedly connected to the two sides of the outer ends of the ladder steps; the ladder plate comprises two stand columns, the two stand columns are connected through a plurality of step beams, and the stand columns are installed in the U-shaped channel steel in a sliding mode; a plurality of grooves are symmetrically formed in the side outer wall of the stand column, each groove is provided with a deepest point, and the deepest points and the outer wall of the stand column are in inclined plane connection; a roller assembly is arranged on the outer side of the groove and fixedly connected with the sliding rail through an elastic mounting seat, and a roller is clamped in the groove through a spring to play a role in preventing the extension ladder from falling.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the climbing ladder device in the construction engineering, concretely relates to a telescopic climbing ladder. BACKGROUND

[0002] Climbing ladders are often used in construction, some of which need to be fixed at a high position or on some structure and ascend with the structure, so that workers need to reach the top plate working position, and a ground ladder section needs to be connected under the fixed ladder section to reach the fixed ladder section, which makes the construction extremely inconvenient.

[0003] To solve the problem that the half-space ladder needs to be connected with a landing triangular ladder for climbing, the prior art provides a telescopic climbing ladder, wherein a telescopic sub-ladder section is arranged in the fixed ladder section of the main body, and the sub-ladder section is pulled down during use, so that the climbing can be conveniently performed upward.

[0004] However, the sub-ladder section in the prior art only has one sliding groove, and the telescopic ladder end has a positioning and limiting mechanism, when the fixed ladder is pulled out, the potential energy of the telescopic ladder section is large due to the combined action of the human force and the weight of the telescopic ladder section, which is easy to cause injury to the worker, when the telescopic ladder section is pushed back, the ladder needs to be pushed into place at one time to be fixed, in order to ensure the safety of the ladder, the telescopic ladder is often made of steel or iron, which is heavy and is difficult for the worker to lift at one time. TECHNICAL CONTENT

[0005] The utility model solves the technical problem that the telescopic climbing ladder fixed in the air only has the top end and the bottom end limiting, and the safety in use is poor and the physical strength is consumed.

[0006] The utility model solves the problem by adopting the technical scheme that

[0007] A telescopic climbing ladder, comprising a fixed ladder fixed on the upper part of a structure, the fixed ladder is composed of a plurality of ladder steps, a telescopic ladder is arranged outside the ladder steps, the telescopic ladder comprises a sliding rail and a ladder plate, the sliding rail is composed of two U-shaped channel steels, the channel openings are oppositely arranged and are fixedly connected to the outer ends of the two sides of the ladder steps, the ladder plate comprises two vertical columns, the two vertical columns are connected through a plurality of tread beams, and the vertical columns are slidingly installed in the U-shaped channel steels.

[0008] A plurality of grooves are symmetrically arranged on the outer wall of the vertical column, the groove has a deepest point, and the deepest point is connected to the outer wall of the vertical column in a slope manner; a roller assembly is arranged outside the groove, and the roller assembly is fixedly connected to the sliding rail through an elastic mounting seat.

[0009] Compared with the prior art, the utility model has the beneficial effects that

[0010] The lower section telescopic ladder is pre-installed on the upper section fixed ladder, and is pulled down to appear by sliding, and is hidden by lifting up, the rollers play a guiding role for the telescopic ladder and make the telescopic ladder more stable in lifting, and reduce friction and impact with the inner wall of the slide rail, the rollers clamp and support the telescopic ladder by the spring, play a role of preventing the telescopic ladder from falling, and can intermittently output when ascending, improve safety and save manpower.

[0011] As preferred, the further technical scheme of the above structure is:

[0012] The roller assembly comprises a fixed frame, a sliding frame, a spring and a roller, the fixed frame is welded or bolted with the side wall of the slide rail, a guide rod is fixed on the side surface of the fixed frame, the spring is sleeved on the guide rod, the sliding frame is provided with a sliding hole corresponding to the guide rod, the sliding frame is installed outside the spring, a support plate is fixed on the outside of the sliding frame, and the roller is installed at the outer end of the support plate.

[0013] The groove positions correspond to the positions of the tread beams, the number of the roller assemblies is equal to the number of the grooves and corresponds to the positions one by one, or the roller assembly is a pair and is arranged at the lower part of the slide rail.

[0014] The left side wall and the rear side wall of the lower end of the slide rail are provided with through holes, the lower end of the stand is provided with a through hole, and a positioning pin is installed in the through holes and the through hole. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a basic structure diagram of the utility model;

[0016] Figure 2 It is a top view structure schematic diagram of the utility model;

[0017] Figure 3 It is a telescopic ladder structure diagram of the utility model;

[0018] Figure 4 It is a ladder board top structure schematic diagram of the utility model;

[0019] Figure 5 It is a telescopic ladder landing position cooperation structure schematic diagram of the utility model and the slide rail;

[0020] Figure 6 It is a telescopic ladder hanging position cooperation structure schematic diagram of the utility model and the slide rail;

[0021] Figure 7 It is a stand surface groove shape embodiment diagram of the utility model;

[0022] Figure 8 It is a roller and ladder board cooperation schematic diagram of the utility model;

[0023] Figure 9It is the utility model roll wheel and telescopic ladder cooperation structure overhead view graph.

[0024] Explanation of reference numerals: 1, fixed ladder; 2, telescopic ladder; 3, slide rail; 31, rear side plate; 32, left side plate; 33, right side plate; 4, ladder board; 41, stand column; 42, tread beam; 5, tongue; 6, recess; 7, through hole; 8, foot plate; 9, limiting block; 10, through hole; 11, positioning pin; 12, roll wheel assembly; 121, roll wheel; 122, sliding frame; 123, spring; 124, fixed frame. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with examples, and the purpose is only to better understand the contents of the utility model, therefore, the example does not limit the protection scope of the utility model.

[0026] Referring to Figures 1 to 9 The utility model provides a telescopic ladder, including the fixed ladder 1 of installation on structure upper surface, the fixed ladder 1 is composed of several steps, and the telescopic ladder 2 is arranged outside the step, and the telescopic ladder 2 includes slide rail 3 and ladder board 4,

[0027] Slide rail 3, adopt two U-shaped channel steel, and the notches are oppositely arranged and are fixedly connected to the two sides of the outer end of the step;

[0028] Ladder board 4 includes two stand columns 41, and the two stand columns 41 are connected by several tread beams 42, and the stand column 41 is slidingly installed in the U-shaped channel steel.

[0029] Referring to Fig. 8 and Fig. 9, the utility model stand column 41 side outer wall is symmetrically provided with several recesses 6, the recess 6 has a deepest point, and the deepest point is connected to the outer wall of the stand column 41 by an inclined surface; the outer side of the recess 6 is provided with a roll wheel assembly 12, and the roll wheel assembly 12 is fixedly connected with the left side wall 32 and the right side wall 33 of the slide rail 3 through an elastic mounting seat.

[0030] The specific installation structure of the roll wheel assembly 12 is: including fixed frame 124, sliding frame 122, spring 123 and roll wheel 121, the fixed frame 124 is welded or bolted with the side wall of the slide rail 3;The side surface of the fixed frame 124 is fixed with a guide rod, the spring 123 is sleeved on the guide rod, the sliding frame 122 is provided with a sliding hole corresponding to the guide rod, the sliding frame 122 is installed on the outer side of the spring 123, the outer side of the sliding frame 122 is fixedly connected with a support plate, and the roll wheel 121 is installed on the outer end of the support plate.

[0031] When the column 41 extends into the cavity of the slide rail 3, the roller 121 is pressed, the spring 123 is contracted, the surface of the column 41 keeps a certain pressure with the roller 121 and uses the roller 121 to avoid collision with the slide rail 3 to smoothly ascend and descend; when the groove 6 on the surface of the column 41 is located at the position of the roller 121, the roller 121 is abutted on the bottom of the groove 6 due to the pressure of the spring 123, the pressing force of the two symmetrical rollers 121 has a limiting effect on the ladder step 4, when there is no further pulling force or pushing force, the clamping force resists the gravity of the ladder step 4 so that the ladder step 4 is kept at the current height. The roller 121 plays a guiding role on the telescopic ladder 2 to make its ascending and descending more stable, reduce friction and impact with the slide rail 3; the roller 121 uses the spring 123 to be clamped in the groove 6 to play a role of anti-falling on the telescopic ladder 2, prevent falling when descending, and can intermittently output when ascending, improve safety and save manpower.

[0032] Optionally, the positions of the grooves 6 correspond to the positions of the tread beams 42, the number (quantity) of the roller assemblies 12 is equal to the number of the grooves 6 and one-to-one corresponds to the positions, or the roller assembly 12 is a pair and is arranged at the lower part of the slide rail 3.

[0033] Through the telescopic telescopic ladder 2, the lower ladder section is hidden in the upper ladder section, when in use, the worker directly pulls out the telescopic ladder 2 from the fixed ladder 1 to climb upward, the work is more convenient. In this scheme, the fixed ladder 1 not only has the original function of being stepped on by people, but also bears the assembly weight of the telescopic ladder 2, so the ladder steps should adopt reinforced steel bars and steel pipes.

[0034] In this scheme, the slide rail 3 adopts U-shaped channel steel, which is directly welded at the outer end of each ladder step, and the two U-shaped channel steels should be parallel and vertical based on the ground.

[0035] The telescopic ladder 2 has at least two position states, which are called hanging position when hidden in the fixed ladder 1 and called landing position when in use, and the following is a structure embodiment provided by the present scheme to constrain the two position states of the telescopic ladder 2.

[0036] Optionally, the inner surface of the rear side wall 31 of the lower end of the slide rail 3 is fixedly connected with a limiting block 9, and the outer side surface of the column 41 is fixedly connected with a tongue 5, and the tongue 5 falls on the limiting block 9; the telescopic ladder 2 section has a downward limiting effect through the cooperation of the tongue 5 and the limiting block 9, which avoids the telescopic ladder 2 from being separated from the fixed ladder 1 on the one hand, and has a fixing effect on the upper end of the telescopic ladder 2 on the other hand, thereby improving the stability thereof in use.

[0037] Optionally, referring to FIG. 6 and FIG. 7, the lower end left side wall 32 and the rear side wall 31 of the slide rail 3 are provided with through holes 10; the lower end of the column 41 is provided with a through hole 7, and a positioning pin 11 is installed in the through holes 10 and the through hole 7.

[0038] The lower end of the column 41 can be provided with a foot plate 8, and the length and width of the foot plate 8 should be equal to or slightly larger than the cross section of the slide rail 3.

[0039] The above merely describes the preferred and workable embodiments of the present application, and is not intended to limit the scope of the present application. Any equivalent changes made according to the content of the present application and the drawings are included in the scope of the present application.

Claims

1. A telescopic ladder comprising a fixed ladder (1) fixed to an upper part of a structure, the fixed ladder (1) consisting of a number of steps, characterized in that: The ladder step is externally provided with a telescopic ladder (2), which comprises a slide rail (3) and a ladder plate (4), The slide rail (3) is formed by two U-shaped channel steels, which are oppositely arranged and fixed to both sides of the outer end of the ladder step; The ladder plate (4) comprises two vertical columns (41) connected by a plurality of tread beams (42), and the vertical columns (41) are slidingly installed in the U-shaped channel steels; The outer wall of the vertical column (41) is symmetrically provided with a plurality of grooves (6), the groove (6) has a deepest point, and the deepest point is connected to the outer wall of the vertical column (41) in a slope manner; the outer side of the groove (6) is provided with a roller assembly (12), and the roller assembly (12) is fixedly connected to the slide rail (3) through an elastic mounting seat.

2. The telescoping ladder of claim 1, wherein: The roller assembly (12) comprises a fixed frame (124), a sliding frame (122), a spring (123) and a roller (121), the fixed frame (124) is welded or bolted to the side wall of the slide rail (3); the side surface of the fixed frame (124) is fixedly provided with a guide rod, the spring (123) is sleeved on the guide rod, the sliding frame (122) is provided with a sliding hole corresponding to the guide rod, the sliding frame (122) is installed on the outer side of the spring (123), a support plate is fixedly connected to the outer side of the sliding frame (122), and the roller (121) is installed at the outer end of the support plate.

3. The telescoping ladder of claim 1, wherein: The position of the groove (6) corresponds to the position of each tread beam (42), the number of the roller assemblies (12) is equal to the number of the grooves (6) and corresponds to the grooves (6) one by one, or the roller assemblies (12) are a pair and are arranged at the lower part of the slide rail (3).

4. The telescoping ladder of claim 1, wherein: The left side wall (32) and the rear side wall (31) of the lower end of the slide rail (3) are provided with a through hole (10); the lower end of the vertical column (41) is provided with a through hole (7), and a positioning pin (11) is installed in the through hole (10) and the through hole (7).

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